HMGETkeyfield [field ...]

Related commands

Time complexity: O(N) where N is the number of fields being requested.

Returns the values associated with the specified fields in the hash stored at
key.

For every field that does not exist in the hash, a nil value is returned.
Because a non-existing keys are treated as empty hashes, running HMGET against
a non-existing key will return a list of nil values.